what's the error??

hi how i can resolve this error! this is my code: I1 = rgb2gray(imread('A.jpg')); points1 =detectFASTFeatures(I1); save('im1.mat', 'I1','points1');

??? Undefined function or method 'detectFASTFeatures' for input arguments of type 'uint8'.

Error in ==> ishrak at 2 points1 =detectFASTFeatures(I1);

Answer 1

[Chad Greene]

This error means Matlab is looking for something called detectFASTFeatures. That something could be a function or it could be a variable. If it's a function on your computer, navigate your current folder to wherever the function is, or you can add the path via addpath.